50.0 MB (2.7 MB compressed)
3511 x 4977 pixels
29.7 x 42.2 cm ⏐ 11.7 x 16.6 in (300dpi)
STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Calcite crystals. Coloured scanning electron micrograph (SEM) of crystals of calcite a form of calcium carbonate. Calcium carbonate occurs naturally in many rocks, such as limestone and chalk. It has a multitude of different industrial uses and is the most common active ingredient in antacid tablets. Magnification: x4000 when printed at 10 centimetres wide.
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